Martin,
the push function is realised by a additional push kontact switch(like old cord switches on household lamps) and screwed in from befind into the Wiper switch. So the push funktion itself is a "add on".
I will check if both of my partnumbers have the same internal circuits.
For the footbox ventilation i thought about "lookalike" hardware with dummy cable visible in the engine bay but having small blower motors inside the venting tubes to increase airflow. These motors are switched on by a pull style alfa romeo switch. The fluted standard knob for the wiper, engraved by a friend with "Push" or "Pull", fits on the hex shaft of the alfa switch.
It will look old with modern internals,
For the "Pull Switch" see the pics in the middle of the page here in my Cobra built up report in the geman forum:
Uwe
